Ethan Bale In this article, we shall explore the matter of preheat and PWHT for welder qualification as per ASME Section IX. Is it necessary to do preheat and/or PWHT? Can a WPS qualified with preheat be used for preparing a welder qualification coupon without preheat? Likewise, can a WPS qualified with PWHT be used for preparing … Read more
This article addresses a couple of questions surrounding the subject of weld reinforcement in welder qualification. I have tried to explore the intent of Section IX on this. Should the weld reinforcement be removed once welding of the welding performance qualification coupon is over? Must it be removed? Is it permitted to remove it? Read … Read more
When the production welding involves a lot of welding of pipes, it is best to qualify your welder on a pipe test coupon. Although, welder qualification for pipe welding need not be necessarily be done on a pipe; a welder qualified on a plate is qualified to weld on pipes too, with some restrictions, as … Read more
In this article we shall discuss about the subject of base metal for welder qualification. What grade of base metal, what thickness of base metal should be used for qualifying a welder in accordance with Section IX. What grades and thicknesses of base metals would he be qualified for in production welding – will also … Read more
In this article I will discuss the subject of qualified weld thickness for welder qualification. This includes the maximum qualified weld thickness and minimum qualified weld thickness. A small section at the end also addresses the qualified base metal thickness for welder qualification, and qualified weld thickness for welding operators as well. Thickness Of Weld … Read more
Welding without backing takes greater skill on the part of welder. Which is why, Section IX has listed deletion of backing as an essential variable for welder qualification. This article will let you know about the various aspects of with and without backing for welder qualification. The latter half of the article gives some attention … Read more
ASME Section IX permits covering multiple welder qualification through single test coupon. In this article, I will discuss various things that must be kept in mind when opting for qualifying multiple welding performance qualifications in a single coupon. A welder must qualify for each of the processes that he intends to use in production welding. … Read more
ASME Section IX permits welding performance qualifications through groove weld coupons as well as fillet weld test coupons. It is for the welding engineer to decide which kind of coupon would be appropriate for his application. In this article we will discuss how to make this choice, and other aspects surrounding welder qualification through fillet … Read more
Generally, the validity of a welder’s qualification is six months, as per ASME Section IX. The welder’s qualification is said to have expired if he has not welded with that process for a period of six months. However, provision has been given in Section IX for renewal of expired welder qualification too. Renewing the validity … Read more
In this article, we shall see about the various aspects related to the matter of validity of welder qualification as defined in ASME Section IX. Validity Of Welder Qualification As Per ASME Section IX? Generally, a qualification is valid for six months. However, the criterion for extending this validity as per Section IX is very … Read more